Method of forming plural ply indented paper pads



March 28, 1950 I c, WALKER 7 2,502,111

- Filed Dec. 5 1945 I N V EN TOR. ('Hmrz. E6 Ma KE/f.

TTTTT N EYS.

Patented Mar. 28, 1950 METHOD OF FORL'IING'PLURAL I'LY INDENTED PAPER PADS.-

Charles E. Walker, Cincinnati; Ohio, assignor to The Fox Paper Company, Cincinnati, Ohio, a

corporation of Ohio Application December 5, 1945, SerialNo. 632,822

7 Claims. (01. 154-s3;05)

The invention herein disclosed relates to the practice of forming pads for protection of various objects during shipping, such as for example, furniture protecting pads. The pads shouldbe bendable in both directions, supply ample cushioning effect, and be in condition for maintaining the assembly such as by being wrapped in a cover of paper.

It is desirable to use indented paper in forming the inner layers of such pads, and for that reason nesting of the indentations of the superimposed sheets mustbe prevented. It is frequently desirable to supply at least three sheets of indented paper in these pads in order to obtain with normally inexpensive paper, a cushion of suitable thickness and suitable resilience and strength.

It is not desirable in supplying indented paper for making into pads to first indent all of the paper and then roll it up and unwind it into the wrapper applying mechanism. The reason for this is that the rolling is likely to crush the indentations and in certain patterns in which the indentations are fairly large, it is almost impractical to roll them up.

In forming the pads, a simple machine may be employed which will not require illustration in which webs of the indented paper of proper width in a combined layer, are caused to meet a wrapping sheet which is caused by curving fixed lateral folders to wrap around the strip of combined in dented webs and fixed by adhesive into a containing sleeve by a lap seam. Suitable streams of adhesive are also employed desirably to cause the wrapper to adhere to the outer webs of the combined" indented strip. A fly knife cuts the pads into proper length. The feed is by feeding rollers that engage the wrapped continuous pad before cutting it into sections.

The problem involved in the present invention is to supply the indented paper webs and set up the combined strip to be wrapped with a. minimum of loss due to crushing of the indentations in the board or paper strips constituting the filler.

In the drawings, I show a series of diagrams Which illustrate the several modes in which this object and ancillary advantages to be noted are accomplished.

Fig. 1 is a diagram showing an instance. where the central web is indented as a part of the wrapping operation.

Fig. 2 is a diagram showing an instance wherein the two outer layers are indented as a part of the wrapping operation.

Fig. 3' is a diagramin which all of the webs are indented as part of the wrapping operation.

will not nest with. the other indented paper supplied. The two outer layers of indented paper will be supplied from already indented webs in rolls 8 and 9. The pattern ofind'entation of these two rolls will'not nest with the pattern formed by the indenting rolls 5. Guide rolls 8a and 9a are shown, so arranged as to guide the two indented strips l0 and l l respectively coming from the two supply rolls 8 and 9 so that they straddle the supply roll' 6 of pl'ain'paper and pass under andover but not in contact with the indenting rolls 5.

All of the webs meet at the point indicated by the line I2. At this point a strip of wrapping paper l3'is fed onto the bottom of the assembly, and the usual folders cause it to fold around the layer of indentedwebs so supplied. The adhesive'supply I321, is preferably so arranged as to supply a marginal stream of adhesive at both edges of the wrapper.

The feed forthe' several strips is supplied by means of rolls l2a which engage the finished wrapped'strip of padding.

In Fig. 2; the previously indented paper is supplied-in a roll 20, to'providethe inner layer 21 of indented paper. It" is of a pattern which will not nest withthetwo outer layers. Two rolls of plain paper are provided as at 22 and 23. These two layers are" caused to passtogether through the drivenindenting" rolls 24. This produces-a sharper and'deeper" pattern of indentation, than if but a singleweb were passed between the rolls, for the reason-that tovbring the indenting-rolls close enough together to. give as sharp an indentation in a single sheet would result incausing the paper to split andtear whereas. with two layers of paperbetween the rolls, the shearing. action of the indenting projections and cavities of the indenting rolls .iscut down. and the layers of paper tend toprotect each otherfrom splitting and cracking.

tween the -two webs 25 and 25, and. its pattern I indenter.

' chine with the web of wrapping paper l3, as in the first instance. In this combination only one of the strips of paper must be rewound after indenting.

In Fig. 3 the arrangement is such thatall of the indented webs are formed as a part of the wrapping operation. of plain paper are supplied. The webs from rolls 30 and 3| pass together through indenting rolls 33, forming indented strips 34 and 35. The webs 34 and 35 are caused by means of guide rolls 30a and 3|a to pass under and over the roll of plain paper 32 and a pair of indenting rolls 36.

The paper from roll 32 is caused to pass between the indenting rolls 36 and then the .web 31 from this indenting operation is caused to come together with the two outer webs at the wrapping point, as before. The inner web will .have a different and non-nesting type of indentation from the two outer webs.

Any one of these operations to the extent that indenting is carried on as a part of the wrap ping operation in a paper retaining sleeve. not only saves the difficulty of transporting bulky ,rolls of indented paper, but more im ortantly saves the defect in such a practice that it tends to flatten out the indentations and incidentally requires a lower and more flattened dome shape to the indentations than are permissible in any of the indicated practice in. which indentation is performed as a part of the wrapping operation.

It is particularly noteworthy that the great advantages of running two sheets at once through indenting rolls is accom lished without loss due to tight rolling the resulting indented webs before using them elsewhere. The reason why this can be done is that intermediate the two similarly indented strips is an indented strip of a non-nesting pattern. Were it not for this, the twin indented pieces would nest and their resilient cushioning effect be largely lost.

Of course, if it were desired to secure the indented layers together without a wrapper using a gluer or a stapling machine, or a tape binding machine, etc., instead of the wrapping machine.

the method of supply would present similar advantages over present methods of merely assembling the pads from pre-indented stock rolls of the material.

Also, while three layers are spoken of, this does not mean that additional layers could not be supplied. Thus when speaking of three layers in the claims that follow, we intend to cover the presence of three layers prepared as set forth with or without additional layers, as being comprised in the method.

One further modification is contemplated which will not require additional illustration to wit: supplying three sets of indenting rolls each acting on a single web of paper. In this form the middle one of the indenting rolls will have a non-nesting pattern with that of the other rolls and the webs from the furthest indenter from the wrapping or assembling point will be caused to travel above the two other indenters, the middle indented web traveling above the nearest Also the indenting rolls may be cated one above the other, with the middle rolls delivering a pattern, non-meshing with the pattern impressed by the outer rolls. Having thus described the invention, What is Thus rolls 30, 3| and 32- claimed as novel and which it is desired to secure by Letters Patent is:

l. The method for use with a machine for wrapping strips of material with a sleeve of paper which comprises continuously supplying said material in the form of at least three webs of indented paper, the-inner web being nonnesting with the two outer webs, the outer webs being directed into the wrapping machine under and over the supply for the inner web, and the supply for the outer webs and the supply for the inner web including at least one web which is indented continuously as it is supplied.

2. The method for use with a machine for wrapping strips of material with a sleeve of paper which comprises continuously supplying said material in the form of at least three webs of indented paper, the inner web being non-nesting with the two outer webs, and the outer webs being directed into the wrapping machine under and over the supply for the inner web, and in which the outer webs are supplied from plain paper the strips of which are brought together and jointly indented and then separated and brought continuously under and over the inner web and into the machine.

3. The method for use with a machine for wrapping strips of material with a sleeve of paper which comprises continuously supplying said material in the form of at least three webs of indented paper, the inner web being non-nesting with the two outer webs, and the outer webs being directed into the wrapping machine under and over the supply for the inner web, and in which the outer webs are supplied from plain paper the strips of which are brought together and jointly indented and then separated and brought continuously under and over the inner web which is supplied as a roll of plain paper passed through an indenting step and thence directly to said machine.

4. That method of supplying three thicknesses of non-nesting paper strips for pad formation which consists in causing a pair of paper strips to pass jointly through a single indenting step thus impressing a sharp but similar pattern on each, causing said strips to feed along in spaced relation from each other, and from a supply located between the spaced layers feeding a strip of indented paper of diiierent pattern between the two initial strips, and then assembling the strips togetheras part of a single continuous operation, the operation of drawing the strips along being supplied by engagement with the strips after their assembly together.

5. The same method of claim 4 in which the supply located between the spaced layers consists of a roll of plain paper which is continuously indented and delivered between the two other strips.

6. That method of supplying three thicknesse of non-nesting strip in pad formation which consists in continuously supplying three webs of indented paper, the inner web being non-nesting with the two outer Webs, the outer webs being directed to a delivery point above and below the supply for the inner web, and the supply of one of the webs, at least being from plain paper indented as it moves along continuously with the other webs, to the delivery point, and engaging the assembly of webs at said delivery point to draw them along.

'7, That method of supplying three thicknesses of non-nesting strip in pad formation which consists in continuously supplying three webs of paper, continuously applying an indenting operation thereto to form indentations in the paper, and continuously feeding the resulting indented webs to a delivery point, the middle Web having non-nesting indentations with the outer web, and at the delivery point assembling the Webs together.

CHARLES R. WALKER.

REFERENCES CITED The followingreferenoes are of record in the file of this patent:

Number UNITED STATES PATENTS Name 7 Date WardeH June 16, 1925 Jopson Oct. 10, 1933 Bahr Jan. 2, 1934 Mosher Aug. 14, 1934 Duvall Feb. 5, 1935 Ellis Mar. 19, 1935 Bomberger Sept. 6, 1938 Kiefier Oct. 24, 1939 Brown Oct. 15, 1946 

